bootstrap/compiletest: msys2 msys `--skip` filter behaves strangely

[jieyouxu]

As I suspected (unfortunately), inside MSYS2 MSYS, the --skip on the exact path does not work (I suspect this is a compiletest problem, not bootstrap). However, MSYS2 MSYS also has several other ./x test-related issues, so this is not worth blocking on MSYS2 problems IMO.

$ ./x test tests/ui/traits/fn-pointer/bare-fn-no-impl-fn-ptr-99875.rs --stage 1 --skip tests/ui/traits/fn-pointer/bare-fn-no-impl-fn-ptr-99875.rs

running 1 tests
.

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 18066 filtered out; finished in 97.23ms

Originally posted by @jieyouxu in #134209 (comment)

[ChrisDenton]

Hm, I didn't get the same result. I'm using the msys2 shell:

$ ./x test tests/ui/traits/fn-pointer/bare-fn-no-impl-fn-ptr-99875.rs --stage 1 --skip tests/ui/traits/fn-pointer/bare-fn-no-impl-fn-ptr-99875.rs
[...]

running 0 tests


test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 18067 filtered out; finished in 5.19ms

Build completed successfully in 0:00:09

Edit: oh that's after 724052f

On current master I need to do:

./x test tests/ui/traits/fn-pointer/bare-fn-no-impl-fn-ptr-99875.rs --stage 1 --skip 'tests\ui\traits\fn-pointer\bare-fn-no-impl-fn-ptr-99875.rs'